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    <script>
        // 1.绝对值方法
        console.log(Math.abs(1));//1
        console.log(Math.abs(-1));//1
        console.log(Math.abs('-1'));//隐式转换 会把字符串-1中转换成数字型
        console.log('pink');

        // 2.取三个整数
        // (1)Math.floor()   向下取整  往最小了取
        console.log(Math.floor(1.1));//1
        console.log(Math.floor(1.9));


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